Ecological interactions in the system: Entomopathogenic bacterium Bacillus thuringiensis—phytopathogenic fungus Rhizoctonia solani—host plant Solanum tuberosum

Bakhvalov, S. A.; Tsvetkova, V. P.; Shpatova, T.V.; Штерншис, М. В.; Grishechkina, S.D.

doi:10.1134/s1995425515040034

Cited by 6 publications

(5 citation statements)

References 15 publications

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“…TS2, B. thuringiensis B-5351, and B. thuringiensis B-6066, which increased the weight of large tubers, the formation of small tubers was lower than of control plots. Similar results were reported by Bakhvalova et al (2015) , who showed that the biomass of potato tubers was increased under the influence of B. thuringiensis H10 strain due to the enhancement of quantity and weight of tubers in ≥ 80-g class, and distribution of Rhizoctonia on potato stolons decreased almost twice. Soil drenching with B. subtilis KU936344, KU936345, and KU936341 strains led to the higher yield of market-grade potato tubers and less unfit for trading tubers, even when compared with plots treated with fungicide Mancozeb ( Kumbar et al, 2019 ).…”

Section: Discussionsupporting

confidence: 89%

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Endophytic Bacillus spp. as a Prospective Biological Tool for Control of Viral Diseases and Non-vector Leptinotarsa decemlineata Say. in Solanum tuberosum L.

et al. 2020

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Viral diseases and their damage causing significant loss to economically important crops have increased by several folds during the last decade. All the conventional approaches are not able to eradicate the viral infection. Therefore, there is a need to look for efficient and eco-friendly viral disease-preventive measures. The genomic material of the majority of deleterious viruses of higher plants is RNA. One of the possible measures to control viruses is the use of ribonucleases (RNases), which can cleave RNA in the viral genome. Based on this, we investigated the RNase activity of endophytic Bacillus spp., which can enrich in 10 3 –10 5 colony-forming units per gram of wet mass of aboveground part of potato plants. A high level of RNase activity was observed in the culture medium of Bacillus thuringiensis B-6066, Bacillus sp. STL-7, Bacillus sp. TS2, and Bacillus subtilis 26D. B. thuringiensis B-5351 had low RNase activity but high ability to colonize internal plant tissues, Bacillus sp. STL-7 with high RNase activity have relatively low number of cells in internal tissues of plants. B. thuringiensis B-6066, B. subtilis 26D, and Bacillus sp. TS stimulate RNase activity in potato plants for a long time after application. Strains with high ability to colonize internal plant tissues combined with high RNase activity reduced severity of viral diseases symptoms on plants and reduced the incidence of potato viruses M, S, and Y. It is worth noting that Bacillus spp. under investigation reduced the number of Leptinotarsa decemlineata Say. egg clusters and larvae on treated plants and showed antifeedant activity. This results in increase of potato productivity mainly in the fraction of major tubers. B. subtilis 26D and Bacillus sp. TS2 combining endophytic lifestyle, RNase, and antifeedant activity may become the basis for the development of biocontrol agents for plant protection.

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Section: Discussionsupporting

confidence: 89%

“…On the day of harvest, the tubers were classified into three fractions—small (tubers < 50 g), seed (tubers between 50 and 80 g), and large (tubers > 80 g)—and weighed separately. Data on the productivity of potatoes were prepared according to Bakhvalova et al (2015) .…”

Section: Methodsmentioning

confidence: 99%

Endophytic Bacillus spp. as a Prospective Biological Tool for Control of Viral Diseases and Non-vector Leptinotarsa decemlineata Say. in Solanum tuberosum L.

et al. 2020

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“…Also, microorganisms are involved in soil processes and the formation of their properties. In summary, the presented results are in line with current trends in the use of a mixture of bioagents for plant protection from harmful organisms to improve the effectiveness of biological plant protection, including inducing systemic resistance to the pathogen [14]. International Journal of Agronomy…”

Section: E Effect Of the Drug Phytop 2682 On The Phytopathogenic Microflora Of The Soilsupporting

confidence: 80%

Influence of the Multifunctional Biological Product Phytop 26.82 on the Growth and Development of Seed Potatoes

Maslennikova

Tsvetkova

Петров

et al. 2021

International Journal of Agronomy

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The study aimed to test a multifunctional technology for potatoes’ biological protection using Phytop 26.82 against black scurf (Rhizoctonia solani Kuhn) and Colorado potato beetle in Western Siberia. The experiment was conducted with the medium-maturing variety “Kemerovchanin.” The product tested was Phytop 26.82. The research methodology was carried out both in laboratory conditions and in the field. In the laboratory, the biological product was used on potato leaves and Colorado potato beetle larvae. The authors revealed the degree of influence of the natural effect Phytop 26.82 on the Colorado potato beetle’s larvae of different ages. The larvae were counted on the 5th, 7th, and 10th days of the experiment. In the field, the authors also revealed the level of the immunogenic effect of the bioagent Phytop 26.82 on the Rhizoctonia stem canker (Rhizoctonia solani Kuhn). The morphological parameters of the Kemerovchanin potato variety were observed during the course of this study. The results of the study showed that the microbial mixture Phytop 26.82 made it possible to increase the biomass of plants by 1.5–1.8 times due to an increase in the length of the aerial part (by 10%), the number of stems (1.2–1.7 times), and the number of stolons (1.5–1.6 times) compared to control. Under the bioagent, Phytop 26.82, Rhizoctonia stem canker on the stems decreased by 45% overall counting weeks. The effectiveness of the bioagent Phytop 26.82 reached 100% in two aspects. One of them was the effectiveness of a biological product in the Colorado potato beetle’s obliteration (Leptinotarsa decemlineata). The second direction of significance was the fight against the black scurf. The use of a mixture of bioagents of the Phytop 26.82 preparation can simultaneously have an insecticidal, fungicidal, and growth-stimulating effect on potatoes.

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“…Several plant-associated bacteria are shown to be antagonistic towards plant-pathogenic fungi. Potato tubers treated with Bacillus thuringiensis proved to suppress rhizoctonia potato disease (Bakhvalov et al 2015).…”

Section: Plant Healthmentioning

confidence: 99%

Harnessing plant-bacteria-fungi interactions to improve plant growth and degradation of organic pollutants

Jambon

Thijs

Weyens

et al. 2018

Journal of Plant Interactions

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Exploiting the potential of bacteria in phytoremediation for the removal of organic and inorganic pollutants from soils and (ground)water holds great promise. Besides bacteria, mycorrhizal fungi and free-living saprotrophs are well known for their strong degradative capacities and plant growth promotion effects, which makes them of high interest for use in different bioremediation strategies. To further increase the efficiency and successes of phytoremediation, interactions between plants and their associated microorganisms, both bacteria and fungi, should be further investigated, in addition to the close interactions between bacteria and fungi. Benefitting from an increased understanding of microbial community structure and assembly allows us to better understand how the holobiont can be modified to improve pollutant degradation and plant growth. In this review, we present an overview of insights in plant-bacteria-fungi interactions and the opportunities of exploiting these tripartite interactions to enhance the effectiveness of phytoremediation of organic pollutants.

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Ecological interactions in the system: Entomopathogenic bacterium Bacillus thuringiensis—phytopathogenic fungus Rhizoctonia solani—host plant Solanum tuberosum

Cited by 6 publications

References 15 publications

Endophytic Bacillus spp. as a Prospective Biological Tool for Control of Viral Diseases and Non-vector Leptinotarsa decemlineata Say. in Solanum tuberosum L.

Endophytic Bacillus spp. as a Prospective Biological Tool for Control of Viral Diseases and Non-vector Leptinotarsa decemlineata Say. in Solanum tuberosum L.

Influence of the Multifunctional Biological Product Phytop 26.82 on the Growth and Development of Seed Potatoes

Harnessing plant-bacteria-fungi interactions to improve plant growth and degradation of organic pollutants

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